Slime-concentrator.



W. F. DEISTER.

SLIME CONGENTRATOR.

APPLICATION FILED JULY 6, 1911.

1,071,714. Patented 1591111.21913.

2 SHEETS-SHEET l.

WITNESSES ,.f INVENTOR COLUMBIA PLANQORAPM co.,wASHlNu10N. D. c4

W. P. DEISTBR.

SLIMB CONGENTRATOR.

APPLIOATION FILED JULY s, 1911.

Patented Sept. 2, 1913.

2 SHEETS-SHEET 2.

INVENTOR WITNESSES YUNITED STATES PATENT OFFICE.'

WILLIAM F. DEISTER, 0F FORT WAYNE, INDIANA.

SLIlVIE-CONCENTRA'IOR.

T0 all whom 'it may concer/n:

Be it known that I, VILLIAM F. Dnrsrnu, residing at Fort Vayne, in thecounty ot Allen and State of Indiana, a citizen of the United States,have invented or discovered certain new and useful Improvements inSlimeConcentrators, of which improvements the following is aspecification.

It is characteristic of tables for treating slime that they have aslight down inclination from the point or edge at which the pulp orslime is fed into the same. It is customary that the surface of thetable over which the slime flows should be provided with waves, suchwaves being usually formed by ribs over which the fabric torming thesurfaces of the table is laid. Heretofore these ribs, the function ofwhich is to catch the values as they settle out of the slime and directsuch material toward a portion of the edge of the table out o the lineof flow of the gangue or tailings, have been arranged in lines at rightangles or so nearly at right angles to the initial direction of flow ofthe pulp or slime hence the movement of the values or concentrates alongthe upper sides of the waves is very slow even when the movement thereofis accelerated by vibrating the tables.

The invention described has for its object an arrangement of wavesrelative to the initial direction o'f flow of the pulp and also thedirection of vibration of the table whereby the movement of theconcentrate toward the discharge edge7 due to the vibration, will beaccelerated by gravity.

It is a further object of the invention to so construct the table thatthe discharge edge for the concentrates will be closely adjacent to theline of flow of the gangue or tailings.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification7Figure l is an elevation of my improved table, looking toward theelevated end of the same; Fig. 2 is a top plan view of the supportingand vibrating mechanism; Fig. 3 is a top plan view of the table; Figs.t, 5, 6, and 7 are sectional views on planes indicated respectively bythe lines IV-IV, V-V, VI-VI, and VII- VII Fig. 3 and Fig. 8 is a detailview shoyfving means for operating table adjusting Sha t.

In the practice of my invention the table Specification of LettersPatent.

Application filed July 6, 1911.

Patented Sept. 2, 1.913.

Serial No. 637,219.

or central posts 2 and by two pairs of adjusting posts, 3 and Ll,arranged on opposite sides of the line ot' central posts and preferablyadjacent to the upper and lower ends of the table as shown in Fig. 2.The upper ends of all o1 the posts have circular sockets for thereception of the semi-circular blocks 5, secured to the under side olthe table. The central posts 2 have eyes G for the reception of theshort shail'ts 7, supported by the channel bars 8, which also form thesupports for the mechanism employed for vibrating the table ashereinafter described. The lower| ends ot the posts 3 and l lit looselyin sockets carried by blocks 9 and 10 having their under faces inclinedand resting on oppositely inclined upper faces of movable blocks 11 and12. The latter blocks are connected to arms 13 and lll secured to theadjusting shaft 15. These inclined blocks or wedges are so arranged thatwhen the shaft is rqtated one end of the table will be raised while theopposite end is lowered an equal distance. This shaft is rotated toadjust the table by a threaded rod 1G engaging the outer end of an arm17 secured to the shat as shown in Figs. 2 and 8. In its vibrations thetable is moved in one direction by a spring 1S bearing at one endagainst an abutment 19 secured to the table, and at its opposite endagainst a plate 20, carried by the threaded rod 21, which passes throughan internally threaded sleeve carried by the channels S. The oppositenievement of the table is ell'ected by a crank pin 22 eccentric to thedriven shatt 23, and a lever 211 having a concave portion in whiclithepin 22 operates. .A roller is loosely mounted on the pin, so that therewill be a small downward slip o1 the lever as the pin engages it,thereby modifying the abruptness of the reversal of the table. Thislever is provided with an upwardly projecting arm 25 adapted to engagethe edge of the table through the medium of a bearing block 2G.

'lhe slime or pulp is run into a box 2i' provided with openings in linewith the radiating cha nncls of the distributer 2S, which is constructedand arranged to discharge the slime onto the table along the entirelength oi its upper edge or head. It will be observed that the directionol vibration ot the table, as indicated by arrow e, is substantially atright angles to the initial direction of the flow of the slime, as

indicated by arrow in Fig. 3, consequently Jfor a given inclination ofthe table the direction of flow ot materials composing the slime will bemodified or changed proportionally to the rapidity and force of theshocks imparted to the table and the specific gravities of the materialscomposing the slime, and the resultant flow of the material will be atan angle more or less acute, to the direction oit vibration. Obviously,the greater the specific gravity the more acute the angle of itsresultant flow to the direction of vibration, and by properlypro-portioning the length of the table, its inclination, and therapidity of the shocks imparted thereto, the light and heavyingredient-s, z'. e., the gangue and concentrates, of the slime may bemade to discharge over different portions of the edge of the table. Asthe slime flows down alongthe table, the heavier ingredients, z'. e.,the concentrates Vor values, will settle down toward or onto the surfaceof the table, and unless provision is made for checking or retardingsuch heavier material, the latter will be carried along to. a greater orless extent with the lighter superincumbent ingredients and aconsiderable proportion of the concentrates will pass away with thegangue at the lower end of the table. The retardation of theconcentrates is effected by means ot waves 29 termed on the surface overwhich the slime flows. rlhese waves aresusuallyformed by strips 30 oitwood or. other material placed underneath the linoleum or other fabricforming the surface of the table, These waves have heretofore beenarranged at, or approximately at Vright angles to the initial iiow andalso substantially parallel with the direction of vibration, so thatafter being caught by a wave the movement of the concentrates toward thefront edge of the table is due almost entirely to the shocks imparted tothe table. In my improved table, the waves are arranged as shown in Fig.3 at an acute angle to the initial direction of flow and to thedirection of vibration .of the table. sind further the waves or riiilesand the means for feeding the slime have been constructedand arrangedheretofore, in such relation to each other, that all the values evensuch as may be deposited on the table above the iirst wave or'riliie arecompelled to move upwardly and over a number of ritfies or waves beforethe values reach the discharge edge. In my improved table, provision ismade for feeding the slime in between adjacent waves or riiiles, whicheX- tend from the head of the table toward or to the edge over which thevalues or concentrates are finally discharged. Hence kany valuesdeposited on the table before the slime passes over a wave or rifilewill be diverted toward the discharge edge by the wave or riiiie againstwhich they may lodge,

and will not be compelled to move over onev or more waves or ritiles toYreach vsuch edge.V In other words a very large percentage of the valuesin the slime will have after separating from the gangue, an unobstructedpath to their discharge edge. As it may not be desirable to have a longconcentrate discharge edge, the lower ends of some of the waves orriftles above which the slime is fed will be above such discharge edge,and in lsuch cases these waves or riiiies will be shortened so as toleave a space adjacent to the portion a of the rim 31 extending from theconcentrate discharge edge around to Y the lower end of the table. Thisclear or unobstructed space b extends down to the discharge edge 33. Itis preferred that all of the waves or riilies above which slime is fedshould be at such an angle as to terminateabove the lower end oft thedischarge edge 38, As there will be a deposit of values at all points ofthe table, the latter should have waves or rittles over its wholesurfaceV land hence a portion of such waves arev necessarily so locatedthat concentrates lodging against them will be directed, some toward thegangue discharge edge 32 and some to 'one side of the latter, or towardthe lower vend oi' the table. j Y

and the gangue flowing to ,one side ot' the rIhe latter concentratesOano'ue discharge edge 32 aredeflected b Y a a i: a ..1 the portion c ofthe rim towardtne discharge edges 32 and 33. 'To preventthe dis-^Vvcharge of concentrates deflected bythe rim Y and some of the wavestoward the gangue` edge 32, over such edge, a rillle 34tis so placedadjacent to such edge -as toy direct ioo the concentrates to theadjacent mineral In order to prevent asplasliingof les ment across thetable, and to thatextent increase the efiiciency of the table. Thistend-Y' ency to direct themovement of the concen- Y i Y Y trates towardthe discharge edge is increased by the vibratory movement imparted tothe table as hereinheiore stated. It will be understood that themovement .of the values or 'concentrates to the mineral .edge whichforms a p art of 'the 2front side of the table should be as directandshort as possible, but this movement should be out of the line of flowof the gangue. In order' to divert the gangue away from the ino-vementof the values, the. side of the table having the mineral discharge edgeis adjusted slightly higher than the opposite or rear side. Thiselevation should be suicient to alittle more than counterbalance thediverting influence of the waves andvibrations on the lighter `edge 33.

ingredients or gangue, but should not be sufficient to materially affectthe movement of the concentrates due to the vibration or gravity, towardthe mine al discharge edge. By giving the table the proper inclinations,longitudinally and transversely, the pulp will tend to flow down andaway from the mineral discharge edge, or toward the left in Fig. 3, andat a very acute angle across the waves. At the same time, the generaldirection of movement of the concentrates will be toward the mineraldischarge. Some of the concentrates will move along the upper sides ofthe waves and some will cross the waves, but at a very obtuse angle tothe waves, and the point of crossing each succeeding wave will be nearerthe right hand side of the table, and also to the mineral dischargeedge. Thus from the time the pulp is discharged onto the table there isnot only a vertical separation of the ingredients, due to difference inspecific gravity, but also a longitudinal separation of the lighter andheavier ingredients. The lighter materials tend to flow by gravitytoward the left hand or rear side of the table in Fig. 3, or at leastare prevented from following the heavier material or concentrates asthey move to the right toward the front side of the table having themineral discharge edge. There is no tendency or opportunity of thelighter and heavier ingredients flowing together after separation hasbegun, except for the small quantity of concentrates which may afterseparation from the gangue, pass across the waves or riffles and thecomparatively small quantity which moves down onto the surface 35 at thelower end of the table. This small amount of concentrates will movealong the surface 35 with the gangue until the discharge edge 32 isreached, when the concentrates will be retained by the ritfle 34 anddirected toward the mineral discharge Diverging lines of flow of thegangue and concentrates are initiated as soon as the pulp begins to flowalong the table, the gangue moving downward toward the lowest corner,due to the inclination of the table, and the concentrates movingdownward to the right along the waves or ri'tfles. The divergence of thegangue from a direct line of flow toward the lower end of the table,causes it to move farther and farther from the concentrates dischargeedge. By properly adjusting the inclination of the table the right handedge of the stream of gangue which is indicated by a dotted line X willintersect the gangue discharge edge 32 some distance from theconcentrate discharge edge, as shown in Fig. 3. Any movement of thevalues or concentrates along the table after they have passed from underthe gangue is useless and hence in my improved table, it is possible toso arrange the concentrate discharge edge and the pulp feeding meansrelative one to the other, that a portion of the pulp will be fed ontothe table in advance (or to the right in Fig. 3) of the mineraldischarge edge. This posi- `tion of the mineral discharge edge relativeVonto the table at points in advance of the mineral discharge edge,whereas it has heretofore been the practice to so construct the tables,that the mineral discharge edge is necessarily a considerable distanceahead of the feed of the pulp, in order to obtain an effectiveseparation of the values and gangue. It is characteristic of theoperation of my improved table that the values having once settled outof the gangue will not be again mingled therewith but move directly tothe mineral discharge edge. By reason of this effective separation it ispossible to reduce the length of travel of the values. As shown in F ig.7, the waves may have their upper sides conside 'ably steeper than thelower sides.

As is well known in the art, some of the values are in such a fine stateof division as to render their separation from gangue slow anddiflicult, and are influenced only to a slightly greater degree than thegangue by the vibrations of the table. A small percentage of these tineconcentrates will flow with the gangue down onto the surface 35 and,being diverted by the portion c of the rim, will move toward the ganguedischarge edge 32. As the table has a slight inclination, the movementof the fine concentrates from behind the ritlle 34, by which they arecaught as the gangue flows over the riille, must be effected by thevibratory action. The reduction of width of the lower end of the tabledue to the location of the mineral discharge edge in the rear of thefeed of pulp, hereinbefore described, will prevent a piling up of theconcentrates behind the rillle 3st, it being impracticable to move suchconcentrates with any degree of rapidity or for any considerabledistance hy the vibratory movement of the table. By thus cutting backthe mineral discharge edge, there will be a very short travel of thefine concentrates collected by the ritlle. This cutting back of themineral discharge edge is advantageousialso as regards the coarserconcentrates, which will begin to settle down onto the table as soon asthe pulp is run onto`it. These 'heavier `,values will readily move tothe4i infamia right .in Fig. 3, and, the discharge edge being cut back,will be discharged nearly as soon as they have moved out from under thelighter gangue.

It will be understood that a water box for the final clean up of theconcentrates may be suitably arranged relative to the mineral dischargeedge, as is customary in the art, f

It is characteristic of my improvements that the waves or riiiies areuninterrupted or continuous across the table, so that nearly allconcentrates or values once depositedV on the table above a i'itlle willremain there until discharged over the inineral edge. Gf course some ofthe very fine concentrates will pass over the riftles above which thepulp was lied, but the quantity will be small. It has been found thatwhere the values pass over the ritlles, such a large amount will collectagainst the lower riflies as togreatly reduce theeitectivenessof thetable. I

I claim herein as my invention: n

1.111 a slime concentrator, the combination of a table having V amineral discharge edge Ain itsl front side, and inclined downwardly fromitshcad and upwardly from its rear side, continuous or unbroken ri Jies,extending from the head diagonally across the table toward the frontrside thereof, means for feeding pulp directly intorthe channelintermediate the rii'itles, means for the direct discharge of valuesfrom the table at the termination ofthe riifle channels extending ronithe point of feed, and means for so vibrating the table that the valueswill move along the riftles and away from the rear side of the table. v

2. In a slime concentrator, the combina-- tion of a table Ahaving amineral discharge edge in its front side and inclined downwardly fromits head and upwardlyfrom its rear side, having a gangue discharge atits lower end continuous or unbroken ritlies originating at pointsalong' the line oI" feed of the pulp, and extending. diagonally acrossthe table and terminating above the gangue discharge edge and adjacentto the front edge of the table, pulp feeding means extending along thehead ot the table and adapted to discharge the pulp into channels formedby the riitles, and means for so vibrating the table that the valueswill move upwardly along the riflies.

3. ln a slime concentrator, the coinbination of an inclined table, meansfor vibrate.

ing the table, means for feeding pulp onto the table along its head orupper end, riiiies extending continuously from the point-s of feeddiagonallyY across the table toward the mineraldischarge edge, said edgebeing in the rear of a line drawn at right angles to the direction oivibration oit'thev table from the upper end of the mineral dischargeedge to the head of the table. l

t. Ina slime concentrator, the combination of anV inclined table havingmineral and gangue discharges adjacent and at anl angle to each other,means for vibrating the table, means for feeding pulp onto the tablealong its head or upper end, ritlies extending continuously from thepoints of feed diagonally across the table toward the mineral dischargeedge, the junction of the discharge edges coinciding witha line at rightangles 'to kthe direction of vibration,r ofthe table and intersectingthe line of feed `of the pulp at a point in the rear of the upper cornerof the table. y

5. In a Vslime co-ncentrator, the combination of an inclined tablehaving mineral and gangue discharge edgesat an angle to eachother,continuous or unbroken riiiies extending trom thehead andV rear edge ofV`the table diagonally across the saine'toward the discharge edges, meansJfor feeding pulp into the channels intermediate the riiiles terminatingabove the lower end of mineralk discharge edge, and means for vibratingthe table. Y

6. In a slime concent-ra'tor, the combination of an inclined tablehaving mineral andV gangue discharge edges adjacent and at an angle toeach other, continuous or une broken rittles extending from the head,and rear edge of the table diagonally across the same toward thedischarge edges, means for feeding pulp intol the channels intermediatethe riitles terminating above the lower end ot the mineral dischargeedge, the other ritlies terminating above the lower end of.

the table thereby providing a space having a unito-rin surface extendingto the gangue discharge edge, a retaining rim extending along the lowerend Vor" the table Yto the Y gangue discharge edge and a ril'tlearranged adjacent'to the gangue discharge Vedge and extending to themineral discharge edge.

in testimony whereof, l have hereunto setvmy hand.

wiLLnii/i fr. nnisrnn; y

lVitnesses i ALI/on A. TiiiLL, TiioMAs JOYCE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washngton,D.G. Y

